User Guide - Honeywell
Contents
1. 26 50047645 002 A2. PLEASE RESPECT YOUR ENVIRONMENT Take care to dispose of this product and any packaging or literature in an appropriate way Catan Mark WHAT IS A PROGRAMMER an Explanation for Householders as recommended by the Energy Savings Trust Programmers allow you to set On and Off time periods Some models switch the central heating and domestic hot water on and off at the same time while others allow the domestic hot water and heating io come on and go off at different times Set the On and Off time periods to suit your own lifestyle On some programmers you must also set whether you want the heating and hot water to run continuously run under the chosen On and Off heating periods or be permanently off The time on the programmer must be correct Some types have to be adjusted in spring and autumn at the changes between Greenwich Mean Time and British Summer Time You may be able to temporarily adjust the heating programme for example Override Advance or Boost These are explained in the manufacturer s instructions The heating will not work if the room thermostat has switched the heating off And if you have a hot water cylinder the water heating will not work if the cylinder thermostat detects that the hot water has reached the correct temperature Clarity approved by Plain English Campaign WHAT IS A CYLINDER THERMOSTAT an explanation for Householder
3. buttons to set the number of days you will be away The display will show the number of days and this number will be flashing to indicate it can be changed The day of the week will also keep changing to show the day you return c If you have made a change to the number of days the message DAYS AWAY OK will appear Press the green button to confirm your selection d The message SAVED will be displayed for a few seconds followed by the date you return to enable you to check you have programmed the holiday function correctly e During the holiday period the LoT Display will show the message ON HOLIDAY and the display will count down the number of days till you return To cancel the Holiday function f To cancel the Holiday function just press the HOLIDAY button again The LoT Display will show CANCELLED and the unit will return to normal operation Note while setting the Holiday function if there is a gap of more than 1 minute between button presses the function will cancel itself automatically and return to normal operation 13 OPERATING YOUR ST9120C Enquiry Mode As the heart of your system the ST9120C has access to temperature information from the other system components and allows you to enquire about this information To enter Enquiry Mode ensure the slider is in the RUN position then press and hold the button for 4 seconds The LoT Display will show the message INFO
4. ST9120C shows the message INTERNAL FAULT Every few seconds the ST9120C screen shows the message SERVICE 70 m mE DAYS Although the heating is still operating the ST9120C screen keeps flashing the message N 7 gt service DUE L 7 w The ST9120C screen shows the message gt SERVICE we 7 M EF No power to the heating system Check that there is power to the heating system Fault in ST9120C Temperature controls are switched off or set too low Call Instal Check that the temperature controls in the system are set to appropriate levels Boiler or other system controls have malfunctioned Fault in ST9120C ST9120C is counting down the number of days until your next boiler service is due Your boiler service is overdue Your boiler service is overdue and the boiler has been automatically switched off to ensure your safety Call Instal Call Instal Arrange a boiler service before the counter reaches zero After servicing your boiler the Service Engineer Installer will reset the ST9120C to remind you when the next boiler service is due Each service is normally a maximum of 1 year apart Arrange an immediate boiler service After servicing your boiler the Service Engineer Installer will reset the ST9120C to remind you when the next boiler service is due Each service is normally a maximum of 1 year apart Arrange an immediate boiler service
5. The LoT Display will provide you with information about the override 12 The Extra Hour Function The EXTRA HOUR button allows you to switch the system ON for up to 3 extra hours without altering the programme Pressing the button once will give one extra hour The LoT Display will display the message 1 HOUR to confirm the button has been pressed When the system is OFF the ae symbol is not displayed pressing the EXTRA HOUR button switches the system ON for just one hour When the system is ON the E symbol is displayed pressing the EXTRA HOUR button extends the programmed ON period by one hour Further presses of the EXTRA HOUR button will increase the extra hour period by one hour for each button press up to a maximum of 3 hours The LoT Display will continue to provide information on the extra hour status To cancel the extra hours just keep pressing the EXTRA HOUR button until the CANCELLED message appears on the LoT Display The Holiday Function The Holiday function allows you to switch off your system for a specified number of days from 1 99 days This lets you save energy and related costs when you are away from home but resumes normal operation on the day of your return To set the Holiday function a Ensure the slider is in the RUN position then press the HOLIDAY button once The message SET HOLIDAY will appear briefly followed by SET DAYS AWAY b Use the or
6. If set to do so it may be possible to obtain limited use of the boiler by pressing the EXTRA HOUR button Each button press will allow operation of the boiler for 1 hour at a time and the screen will display the message On th After servicing your boiler the Service Engineer Installer will reset the ST9120C to remind you when the next boiler service is due Each service is normally a maximum of 1 year apart 23 FAQ AND TROUBLESHOOTING Troubleshooting Guide cont Symptom ST9120C shows the message SENSOR LOW BATT and a flashing tap symbol F CS92A battery low indication press CS92A button and red light gives a short flash every second 0 1s on 0 9s off Note light will switch off after approx 1 minute to save battery power ST9120C shows the message NO SIGNAL and a flashing tap symbol ST9120C shows the message SENSOR FAULT and a flashing tap symbol P CS92A sensor error indication Press CS92A button and red light blinks 0 5s on 0 5s off Note light will switch off after approx 1 minute to save battery power 24 Possible Cause CS92A batteries are running low on power Remedy Change the CS92A batteries see page 19 for how to do this CS92A batteries are running low on power Change the CS92A batteries see page 19 for how to do this RF communication Check direct path between both path between products and re position any objects ST9120C
7. MENU to confirm that you have entered Enquiry Mode Pressing the or buttons then allows you to step around and view the available information The LoT Display will continue to update to tell you what information is being viewed and the main display will show the value If the information is not available the display will show dashes instead of a temperature value The table below shows the type and sequence of information available in Enquiry Mode To exit Enquiry Mode If the button is not pressed for 30 seconds your ST9120C will return to RUN mode Information LoT Message Other display symbols Room temperature setting ROOM SET F Hot water temperature WATER TEMP fej F Hot water temperature setting WATER SET if This information will be available if you have a room temperature control system with a DT92E room thermostat F This information will be available if you have a hot water control system with a CS92A hot water sensor ROOM TEM ROOM SET es oo Jee fe SET e lg WATER TEMP m Bo SA 14 FINE TUNING YOUR ST9120C Changing from AM PM Time Display to the 24 Hour Clock Your ST9120C can operate on the 12 hour AM PM or 24 hour clock formats To change the format ensure the slider is in the RUN position then press and hold the and buttons together for about 2 seconds Ignore the NOT VALID message that will appear briefly Then the
8. and that may be blocking the signal CS92A is blocked possibly by a metal object CS92A sensor cable may be disconnected from the wiring terminals Relocate the CS92A transceiver if possible Re connect the sensor wires to the CS92A terminals Fault with CS92A Call Installer 25 Insert application number as per Installation wiring diagrams Configuration Data to be completed by Installer The tables below are for the Installer to complete to indicate how your ST9120C has been configured T9120C Configuration standard 24hr or am pm clock am pm display VY display 24hr display Display backlight operation Off on if button pressed on continuously Automatic time change disabled enabled 1 day or 5 2 day or 7 day 1 day operation operation 5 2 day operation 7 day operation Number of ON OFFs per 2 on offs per day ey on offs per day efault time programme standard at home econom ee a Optimum start no optimum start delayed start optimum start on Optimum start limit 1 hour 2 hours 3 hours more o ee a enabled Frost protection temperature From 5 to 16 C 5ce _ O O o o Minimum ON OFF time 1 2 3 4 5minutes 1 minute o o o lt o peme o o a S P E per hour Proportional band width ___ From 1 5t03 0 C_ 15 C Failsafe mode loss ofRF of lt Jv communications n O rd TCS This option will not operate on a hot water only system
9. displayed times will be changed automatically to the new format Repeating this procedure will change the clock display back to the original format Changing the Installer Parameters The ST9120C has a special Installer Mode where some features can be adjusted to suit your lifestyle or preferences these are called Installer Parameters and are listed in the table below along with a description of the options that are possible Your installer should set this up for you to suit your application see CONFIGURATION amp SERVICE DATA section However you may wish to alter some of the settings yourself and this section shows you how to do this Note some parameters indicated by are not used used if your system is only controlling the hot water INSTALLER Parameter Default Options Description PARAMETER Number Value 24hr or am pm 1 12 12 24 12 am pm display clock display 24 24hr display Configure backlight 2 2 0 1 2 0 off operation 1 on if button pressed 2 on continuously Enable disable auto 3 1 0 1 0 disabled time change 1 enabled 1 day or 5 2 day or T 1 5 7 1 1 day operation 7 day operation 5 5 2 day operation 7 7 day operation Number of ON OFFs 5 3 2 3 2 2 on offs per day per day 3 3 on offs per day Select default time A A b C A standard programme b at home C economy Set hot water 60 C 40to Stored hot water set temperature 85 C temperature 15 FINE TUNING YOUR
10. so that you are not cold when you get up in the morning A shorter heat up time is required for other heating periods 5 In the evening when the house is up to temperature it is often possible to switch off the heating up to an hour before you go to bed without any noticeable reduction in comfort T9120C 1 ON period indicator Time Display 3 LoT Technology Display 4 Programme Time Markers O Day of Week Indicator FF Symbol Q Extra Hour Button O Indicator Lamp O Override Button ON1 ON2 gt ONS OFF2 OFF3 686686888 Ho CF criaron Slee OVERRIDE Boiler Status Indicator Slider Operating Mode Indicator Operating Mode Button OK Next Button Clock and Buttons Holiday Button Copy Day Button Next Day Button CS92A CONTROLS LAYOUT Transceiver Sensor element Green light under button Button Red light under button Honeywell te nan CONFIGURATION amp SERVICE DAT Boiler amp System Service Log The space below can be used to provide a record of boiler amp system services and the names and contact numbers of the Installer and Service Personnel This information is important for a Home Information Pack Service Installation Installation Service Date Engineer Telephone Number Contact Details This product and its associated documentation and packaging are protected by various intellectual property rights belongin
11. water cylinder and a wireless transceiver box that is normally mounted on a wall surface apart from the cylinder The transceiver communicates with the ST9120C programmer and regularly sends the hot water temperature measurement to it Sensor element Transceiver Battery Replacement The CS92A batteries should last for a minimum of 2 years Well before they run out CS92A will communicate with ST9120C and it will show the message SENSOR LOW BATT whilst also flashing the tap symbol Batteries are accessed by unclipping the front cover at the bottom Note battery polarity Reverse process to refit front cover Use 2xLR6 AA alkaline batteries only Error Indications To save battery power CS92A will indicate error conditions on the LoT Display of ST9120C It is possible to view the CS92A sta tus by pressing the button on the transceiver gt box The lights underneath this button will ea provide feedback as shown in the table Go to the FAQ AND TROUBLSHOOTING section for more information Flashes up to 5 times in Everything is OK red light shows signal succession then repeats strength press button again to exit Flashes 0 5 s on 0 5 s off Sensor error check sensor connection Flashes 0 1 s on 0 9 s off Battery low condition replace batteries i Loss of communications 20 How do set the time only if the ST9120C clock is not correct Your ST9120C contains an accurat
12. At this point just follow the instructions again What happens if there is a power failure In the event of a mains power failure the ST9120C display will go blank the indicator lamps will go out and the control outputs will switch off The real time will be constantly maintained by means of the built in battery backup ready to power back up as if nothing had happened when the mains power is restored In addition all programmes and settings are stored in a special memory called Non Volatile memory which requires no power to maintain information so will be retained indefinitely Should the correct time and date ever be lost for whatever reason the message SET DATE TIME will be displayed whilst the slider is in the RUN position In this case simply follow the procedure described under Step 1 Setting the Date amp Time page 6 It should not be necessary to make any changes to your programmes 21 How reliable is 2 way RF communication The 2 way RF communication also known as wireless communication used by Honeywell is extremely robust and reliable When installed correctly the Signal Strength test feature allows the Installer to locate the system components where mutual signal reception is strong During communication signals are sent several times to ensure receipt and if any message is garbled the error detection software recognises this and ensures the message is repeated again What do do if RF commu
13. MONDAY will now be flashing to indicate it can be changed If you do not wish to change the time press the green OR button and move to the next step If you do wish to make a change use the or buttons to change the first ON 1 time Each press of the button will change the time by 10 minutes As soon as the time has been changed the message ON TIME 1 OK will be displayed Press the green Ok button to confirm the time is correct and move to the next step SAVED will be displayed for a moment to confirm that any change has been saved to memory Fa FMON MON D SET ON TIME ON TIME i OK fe k 7 Ilia SF riz A Pid E R P E R on ON2 ON ON ON2 ON OFF1 OFF2 OFF3 OFF1 OFF2 OFF3 Honeywell C Honeywell a Note When pressing the button the next ON or OFF marker may start to flash This indicates you have tried to set a time equal to one of the next programme times already in the memory Similarly when pressing the button the previous ON or OFF marker may start to flash This indicates you have tried to set a time equal to one of the previous programme times If this happens the ST9120C simply moves both times together as long as you continue to press the or buttons Follow the procedure in Reviewing the Programme Times page 9 to check and adjust these times as necessary c SET OFF TIME 1 will be displayed and the fir
14. ST9120C INSTALLER Parameter Default Options Description PARAMETER Number Value Optimum start 0 1 2 0 no0 optimum start 1 delayed start 2 optimum start on 1 Optimum start limit Optimum stop 0 0 disabled 1 enabled re 1 Frost protection 5 5to Frost protection temperature 16 C temperature 2 Minimum ON OFF A Minimum ON OFF time time in minutes Cycle rate Proportional band 1 5to Width of control width 0 C proportional band in C Failsafe mode loss of i 0 off RF communications 1 heating on 20 Reset all parameters 1 0 1 0 do not reset 1 default parameters To Enter Installer Mode a Ensure the slider is in the RUN position then press and hold and buttons together for 8 seconds Ignore the NOT VALID message that is displayed for a few seconds The message SET UP MENU will show briefly followed by SET INSTALLER OK b Press the button to take you into the Installer Mode Parameter Menu c Parameter 1 is now available to change This is to allow you to change the clock format from 12 hour AM PM to 24 hour At every step the LoT Display will inform you what the parameter means and what option you have selected The parameter number is shown on the display separated by a colon from the parameter value d You can change the parameter value by pressing the or buttons At this point the description in the LoT Display will change and t
15. and this will move you to the next step The month digits will now be flashing and SET THE MONTH will be displayed To change the month press the or buttons until the correct month is shown The message IS MONTH OK will be displayed Press the green button to confirm the month is correct and move to the next step The year digits will now be flashing and SET THE YEAR will be displayed To change the year press the or amp buttons until the correct year is shown The message IS YEAR OK will be displayed Press the green button to confirm the year is correct If you have made a change and the date is a valid date the message DATE SAVED will show and you can move to the next step If the date you set was not valid for example 31 September the message INVALID will show and you will be returned to the start of the date setting operation The time will now be flashing and the message SET THE TIME will be displayed To change the time press the or buttons until the correct time is shown Each press of the button will change the time by one minute Holding the button down for more than a few seconds will change the time slowly at first then quickly The message IS TIME OK will be displayed Press the green k button to confirm the time is correct If you have made a change the message TIME SAVED will show followed quickly by DATE TIME COMPLETE Move the
16. e digital clock that is factory set Should you ever need to change the time just follow this procedure a Move the slider to the DAY TIME position b Keep pressing the green Ok button until the message SET THE TIME is displayed To change the time press the or buttons until the correct time is shown The message IS TIME OK will be displayed Press the green k button to confirm the time is correct If you have made a change the message TIME SAVED will show followed quickly by DATE TIME COMPLETE c Move the slider to the RUN position to complete changing the time What do do when the clocks go back in October and forward in March Your ST9120C is factory set to change the clock automatically at the correct dates so you should never need to adjust the clock forward or backwards yourself It is possible to disable this particular feature as described in the section Changing the Installer Parameters page 15 You may also check the section Configuration amp Service Data page 26 to see how your Installer has configured your product What should do if get lost while programming the ST9120C The LoT Display on ST9120C will provide you with help and tips to work through the programming Should you ever get lost the simplest thing to do is to move the slider to the RUN position and then move it back to the appropriate programming position where you got lost
17. ess the green button to confirm and the message MON COPIED will be displayed for a moment The day into which Mondays programme has been copied is now available to have its programme edited Note Once a day s programme has been confirmed in this way it now becomes the day whose programme is copied if the COPY DAY button is pressed again OR Programming a Different Day i Press the NEXT DAY button to select the next day which is displayed along the top of the screen The programme for that day can then be adjusted by following steps b e above Programmes for the remaining days can be set in the same way using the NEXT DAY button to move to the next day 10 PROGRAMMING YOUR ST9120C Exiting Programming Mode To exit programming mode move the slider to the RUN position This can be done at any time during the programming process and any changes made and confirmed with the R button will have been saved Note If the unit is left in Programming mode for more than 10 minutes without the slider being moved or any buttons pressed the message MOVE SLIDER will be displayed Press a button to finish programming or move the slider to the RUN position Disabling Enabling Time Periods To disable any of the time periods ON 1 to OFF 1 ON 2 to OFF 2 or ON 3 to OFF 3 simply set the ON time and its paired OFF time to the same time and the programme will just ignore them To re enable the time period simply set the
18. g to Honeywell Inc and its subsidiaries and existing under the laws of the UK and other countries These intellectual and property rights may include patent applications registered designs unregistered designs registered trade marks unregistered trade marks and copyrights Honeywell reserves the right to modify this document product and functionality without notice This document replaces any previously issued instructions and is only applicable to the product s described This product has been designed for applications as described within this document For use outside of the scope as described herein refer to Honeywell for guidance Honeywell cannot be held responsible for misapplication of the product s described within this document Manufactured for and on behalf of the Environmental and Combustion Controls Division of Honeywell Technologies S rl ACS ECC EMEA Z A La Pi ce 16 1180 Rolle Switzerland by its Authorised Representative Honeywell Inc 27 Contents CONTROL OF YOUR SYSTEM General Description of Controls in Your System 4 The way to use a TimMer 4 YOur Cylinder IMGnMOStat i csendnasesscessesezcscasessaenatyssacsstessindecesteczcecueuptacnacesz4si 4 5 GETTING STARTED WITH YOUR ST9120C Step 1 Setting the Date amp Time oo ccc cceeesseeeeseeseeeeneeesseeesseeseeessesseeeeaeeas Step 2 Running a Built in Programme PROGRAMMING YOUR ST9120C The Built in Programmes Your Personal Program
19. he parameter value will flash If you press the value will stop flashing and be saved for use 16 FINE TUNING YOUR ST9120C e Press to move to the next parameter available for editing f Keep pressing OK to step around the list of parameters and use buttons to change the parameter value g Any parameter changes that have been confirmed with the K button will be saved and used To Exit Installer Mode h You can exit Installer Mode at any time by moving the slider to the next position and then back again to RUN Note Installer Mode will exit automatically after 10 minutes if the slider is not moved 17 If your house is rented by Law your gas boiler should be inspected once a year to ensure it is operating safely Your ST9120C Timer has a range of features designed to help make sure this service is carried out at the correct time These features will be programmed by your Installer Maintenance Engineer or Landlord e If it has been set to do so ST9120C will display a message on the screen to remind you that a boiler service is due e If the service is overdue the Timer may switch off the heating system to ensure your safety If this happens you must arrange an immediate service visit Contact details should be listed on page 26 of this guide in the section Boiler amp System Service Log e Acontact telephone number may also have been programmed into the ST9120C If so a message will appear
20. me 8 Reviewing the Programme TimesS 0 00 9 9 1 Modifying the Programme Disabling Enabling Time Pe OPERATING YOUR ST9120C Choosing the Operating Mode iii ssc eciasne caseniecen eiA Ei 12 Overriding the Operation Without Changing the Programmes z The Extra Hour Function The Holiday Function i EMQUIFY Mode siccssc cuorntececccedseaanensinssaatessceuuncanned E RAAE EEE ASAE 14 FINE TUNING YOUR ST9120C Changing from AM PM Time Display to the 24 Hour Clock A Changing the Installer Parameters 0 0 cccceeeeeeseeeeeeteeseeesesseteetersneeaeees BOILER SERVICE REMINDER Countdown to Service When Service is DUC eee eeeceseeesenetetteeeneeeees 18 SIMULSCO WIM sanii ens EREE EEANN OO AEEA 19 OPERATING YOUR CS92A HOT WATER THERMOSTAT Basic OP ONAtOM ie Sescssecats estsccdsncctusasczeesseazssendtheedeteescsas oi AASA TTET EE RA Eaa Battery Replacement a Error INCI CQUONG cescsssisseccsececenattisssnsssendineciantindnnesudecesesattsieieoutevanenranissoeneredecee FAQ AND TROUBLESHOOTING Frequently Asked QUESTIONS sssidivsasespeeven nce tas snnendtecceeaentanenasensieeunedediaitineondeces 21 Troubleshooting Guide CONFIGURATION amp SERVICE DATA to be completed by Installer 26 General Description of Controls in Your System Your Honeywell ST9120C provides timing control for your hot water system letting you set ON and OFF periods to suit your own lifestyle The ST9120C d
21. nication is lost Follow the steps in the Troubleshooting Guide on the next page The most likely cause for loss of communications is the CS92A batteries running low on power This will be indicated on CS92A as described on page 19 Simply replace the batteries as shown on page 19 and wait a few minutes for communications to become re established If this does not resolve the problem it may be that the RF signal path between the ST9120C and the CS92A is blocked by a metal object Check the direct path between the two devices and reposition any object that may be blocking the signal or move the thermostat How do I know when to change the batteries in the CS92A cylinder thermostat If the CS92A batteries need changing ST9120C will show the message SENSOR LOW BATT and the tap symbol will flash You can confirm this by pressing the CS92A button whereupon the red light will give a brief flash every second to indicate a low batter y state It is important to change the CS92A batteries as soon as the low battery condition is indicated as reduced battery power may affect the RF signal strength and impair RF communications 22 Troubleshooting Guide This is a quick guide to help you diagnose and cope with possible problems with your wireless control system For further assistance please contact your Installer ST9120C has a blank LCD display ST9120C indicates the system is ON but taps are running with cold water
22. oes not directly control the temperature but works together with a CS92A wireless cylinder thermostat With 7 day programming and up to 3 on off periods per day every day can be set differently ST9120C also has a Boiler Service reminder Shut down feature which helps ensure your gas boiler is regularly serviced in compliance with UK Gas Safety Regulations For more details see pages 18 amp 19 Your system includes a CS92A wireless cylinder thermostat and may include other Honeywell wireless controls These products use state of the art 2 way RF communications to share information and give you robust and flexible control of your indoor environment The following instructions explain how to programme and use the ST9120C and associated controls to provide the most home comfort at the least cost The way to use a Timer Think about the time periods when you are typically in the house and when you are not These are the times you should use as the basis for the programmes It will be necessary to allow some heat up time for the heating system after periods when it has been off this would typically be 1 1 hours depending on your house and your preferences Other features are commonly available on the Timer to enhance comfort and convenience for example OVERRIDE EXTRA HOUR and MODE buttons A typical use of the OVERRIDE feature is when you return home unexpectedly for the rest of the day and the hot water is off Just press
23. on the LoT Display indicating the number you should call Countdown to Service Your ST9120C can indicate a countdown for the number of days until your service is due This message will appear on the screen every few seconds to give you an opportunity to schedule a service visit SERVICE I m i DAYS When Service is Due When your boiler service is OVERDUE the words SERVICE DUE will continue to flash on your screen and you should arrange an immediate service visit 18 Se 7 Fain Ld CONT ONCE CEU OFF BOILER SERVICE REMINDER Shut down If your ST9120C shows the words SERVICE DUE and OFF then your boiler service is overdue and the boiler has been automatically switched off to ensure your safety you should arrange an immediate service visit If set to do so it may be possible to obtain limited use of the boiler by pressing the EXTRA HOUR button Each button press will allow operation of the boiler for 1 hour at a time and the screen will 1 y display the message On 1h as shown However Eg i you should still arrange an immediate service visit as this will allow you to comply with the law and ensure your gas boiler is operating safely Z ia A SERVICE DUE OPERATING YOUR CS92A HOT WATER THERMOSTAT Basic Operation Your CS92A consists of a sensor element that is strapped to the metal surface of the hot
24. s as recommended by the Energy Savings Trust A cylinder thermostat switches on and off the heat supply from the boiler to the hot water cylinder works by sensing the temperature of the water inside the cylinder switching on the water heating when the temperature falls below the thermostat setting and switching it off once this set temperature has been reached Turning a cylinder thermostat to a higher setting will not make the water heat up any faster How quickly he water heats up depends on the design of the heating system for example the size of boiler and he heat exchanger inside the cylinder The water heating will not work if a time switch or programmer has switched it off And the cylinder hermostat will not always switch the boiler off because the boiler sometimes needs to heat the radiators Cylinder thermostats are usually fitted between one quarter and one third of the way up the cylinder The cylinder thermostat will have a temperature scale marked on it and it should be set at between 60C and 65C then left to do its job This temperature is high enough to kill off harmful bacteria in the water but raising the temperature of the stored hot water any higher will result in wasted energy and increase the risk of scalding Honeywell Control Systems Ltd Arlington Business Park Bracknell Berkshire RG12 1EB Technical Help Desk 08457 678999 50047645 002 A www honeywelluk com 2011 Hone
25. set up to work correctly when it was installed However the following will show you how you can modify your settings to meet your particular lifestyle To assist you with programming and everyday use your ST9120C will display text messages at every stage to help you get the most out of your central heating system The ST9120C uses LoT Technology to constantly update the display to give you feedback about what is required Step 1 Setting the Date amp Time Your ST9120C had the date and time set at the factory and these are normally maintained by a backup battery in the event of power failures If you wish to change the date or time or if the LoT Display shows the message SET DATE TIME just follow the instructions below Otherwise go to Step 2 a Move the slider to the DAY TIME position The message SET DATE TIME will show briefly on the screen followed by SET THE DAY and the day of the month will now be flashing to indicate it can be changed DAY TIME PROGRAMME RUN Honeywell f To change the day of the month press the or buttons until the correct day is shown Each press of the button will change the date by one day As soon as a change has been made the message IS DAY OK will be displayed Once the correct day is reached press the green button to confirm and move to the next step If you do not need to make a change just press the button immediately
26. slider to the RUN position to complete setting the date and time Note if the slider is moved at any time before the date and time have been set correctly the message DATE UNCHANGED will be displayed briefly and your changes will not be saved Step 2 Running a Built in Programme With the date and time correct your ST9120C Timer will now be operating to the built in programmes These have been designed to provide hot water at typical times throughout the day but if you want to customise the settings please see the next section PROGRAMMING YOUR ST9120C page 8 The Built in Programmes The built in programmes give you a starting point that you can personalise to your own requirements Your Installer should have selected one and ticked the box alongside it If there is no tick the product normally leaves the factory with Profile A installed but it is a simple matter to select one of the other profiles see Changing the Installer Parameters page 15 Built in Programme Profile A ON 1 OFF 1 ON 2 OFF 2 ON3 OFF 3 Monday to Friday 6 30am 8 30am 12 00pm 1 00pm 4 30pm 10 30pm Saturday amp Sunday 6 30am 9 30am 12 00pm 1 00pm 4 30pm 11 00pm Built in Programme Profile b ON 1 OFF 1 ON 2 OFF 2 ON3 OFF 3 Monday to Friday 6 30am 9 30am 12 00pm 1 00pm 4 30pm 11 00pm Saturday amp Sunday 6 30am 9 30am 12 00pm 1 00pm 4 30pm 11 00pm Buil
27. st OFF 1 time will now be flashing If you do not wish to change the time press the green OK button and move to the next step Otherwise use the or buttons to change the time Press the green button to confirm the time is correct and move to the next step SAVED will be displayed for a moment to confirm that any change has been saved to memory d The remaining ON and OFF times ON 2 OFF 2 ON 3 OFF 3 can be set by using the or buttons to change the time then the green K button to confirm the time is correct and move to the next step If you do not wish to change the time just press the green Ok button to move directly to the next ON OFF time without making any changes e After setting or reviewing the last off time OFF 3 the message COMPLETE will be displayed to indicate the times for Monday have been set You now have a choice of how to set the programme for the next day Copying One Day s Programme to Another Day example Monday to Tuesday f Whilst the day is showing Monday Press the COPY DAY button The message COPY MON TO TUESDAY OK will be displayed and the letters TUE will flash to indicate the programme for Monday can be copied to Tuesday g Toselect a different day to copy to press the NEXT DAY button to cycle through the days With each press of the NEXT DAY button the message will change to indicate the new day you are copying to h When the required day is indicated pr
28. t in Programme Profile C ON 1 OFF 1 ON 2 OFF 2 ON3 OFF 3 Monday to Friday 6 30am 7 30am 12 00pm 12 00pm 5 00pm 10 00pm Saturday amp Sunday 8 30am 9 30am 12 00pm 1 00pm 5 30pm 10 30pm Your Personal Programme The table below has been left blank for you to record your own personal programme ON 1 OFF 1 ON 2 OFF 2 ON 3 OFF 3 Monday Tuesday Wednesday Thursday Friday Saturday Sunday Reviewing the Programme Times To review your programme move the slider to the PROGRAMME position To review the programme times press the OK button repeatedly The appropriate ON and OFF markers will be displayed to show you which time is being reviewed Any of these times can be adjusted by using the or buttons and then confirmed using the button Remember to return the slider to the RUN position after reviewing is complete Modifying the Programme The programme has three pairs of ON OFF switching times per day Each time can be set between 3 00 am and 2 50 am on the next day to allow you to programme to stay on past midnight if required a Move the slider to the PROGRAMME position SET PROGRAMME will show briefly to verify this action SET PROGRAMME DAY TIME PROGRAMME RUN _ Honeywell NODE b SET ON TIME 1 will then be displayed and the time setting for the first ON 1 time for
29. the OVERRIDE button and the hot water will come on until the next programme time at which point it will follow the normal programme The advantage here is that you do not have to remember to switch off because the normal time programme does this for you CONTROL OF YOUR SYSTEM CONT A typical use of the EXTRA HOUR button would be if you returned to the house for a short period when the hot water was off Pressing the EXTRA HOUR button gives you 1 2 or 3 hours of hot water exactly when you need it Another typical use is when the hot water is already on and you want it to stay on a little longer just press EXTRA HOUR and for that day only an hour will be added to the end of the time at which hot water normally goes off The MODE button allows you to select how you want to operate your hot water A typical use of this feature would be if you take a mid week day off work you can then set the MODE to ONCE to keep the system ON during the day from the first programmed ON time till the last programmed OFF time Your Cylinder Thermostat Your CS92A wireless cylinder thermostat measures the water temperature and signals this to the ST9120C timer The timer then performs all the necessary control actions to maintain the water temperature at the set value The set temperature is programmed by your Installer in the ST9120C Installer Mode and you should never need to change this A value of 60 C is typical Your ST9120C should have been
30. two ON and OFF times to be different 11 Choosing the Operating Mode The operating mode may only be changed when the slider is set to the RUN position The F symbol is displayed during a programmed on period A green INDICATOR LAMP shows when the system is switched ON A MODE button is provided to select the Operating Mode and therefore how the system is controlled There are four possible Operating Modes these are OFF AUTO ONCE CONT Pressing the MODE button scrolls round these modes in sequence and the display indicates which mode is currently active SAT SAT 19 06 2010 19 06 2010 WUSU o WUU lal uy a T amp Honeywell Honeywell e OFF mode The system will remain OFF e AUTO Automatic mode The system will be switched ON and OFF according to the programme e ONCE mode The system will come ON at the first programmed ON time and go OFF at the last programmed OFF time e CONT Continuous mode The system will remain ON continuously Overriding the Operation Without Changing the Programmes In AUTO and ONCE operating modes the OVERRIDE button switches the hot water ON or OFF without altering the programme When the E symbol is displayed pressing the OVERRIDE button switches the system OFF until the next programmed ON time If the symbol is not displayed pressing the OVERRIDE button switches the system ON until the next programmed OFF time
31. ywell International Inc System Components This section is to be completed by the Installer Location ST9120C CS92A 3 w typically next to hot water cylinder in bedroom Energy Efficiency and the Environment Home energy use is responsible for more than 1 4 of the total UK carbon emissions which contribute to climate change Heating and hot water systems based on boilers account for 7 of this figure so it is important to understand how your controls can help to maximize energy efficiency while maintaining your comfort Your Timer should be used in conjunction with appropriate temperature controls In order to save energy the following general points should be observed 1 Ensure your system contains a room thermostat where appropriate and a hot water thermostat and that it is set to an appropriate temperature level typically 20 C 2 Programme your heating and hot water to be off when you are not in the house If you are concerned about possible frost damage to any exposed pipe work it is advisable to fit a frost protection system your installer can advise you about this 3 Think about how you use your domestic hot water if you have a storage system it is not necessary to have this switched on all the time even when you are in the house 4 Consider the heat up times required for your central heating Every home responds differently when the heating is switched on Adjust the start time
Download Pdf Manuals
Related Search